NOTE: Corteau = core TOE This spring, Native Americans are gillnetting and spearfishing on lakes in east-central Minnesota. They were granted this right in a treaty with the US government -- a treaty recently upheld in court. Treaty rights, native casinos, and tribal police forces are visible reminders that Indian tribes are sovereign nations. But some say the concept of native sovereignty is flawed. As part of this week's Mainstreet Radio series, Mille Lacs resident Frank Courteau says no system can flourish that divides people by race.